Glossary
A/B roll editing
An editing method that uses two or more playback VCRs to create special effects such as dissolve and wipe, and uses one record VCR to record the results of the editing. Using an editing control unit allows efficient control of the VCRs and very precise editing.
AES/EBU format
A unified format for digital audio signals. It allows a single connector to carry the signals for two channels.
A chrominance signal determined by subtracting the Y (luminance) signal from the B (blue) signal. One of the component signals.
Chrominance signal
Color signal containing color information such as hue and saturation. Also called C signal.
Component signals (YRB)
A video signal consisting of a luminance signal (Y) and two chrominance signals (R−Y, B−Y).
Composite signal
A composite video signal containing video, burst and sync signals.
Drop frame mode
Time code runs at 30 frames/sec. The NTSC system, however, runs at about 29.97 frames/sec. Drop frame mode adjusts this difference. The time code and video are synchronized by dropping the first two frames of the time code every minute, except at the
EE mode
EEis an abbreviation of “Electric to Electric”. Video and audio signals are supplied to the recorder’s internal circuits, but not to the recording heads.
LAN (local area network) A network system connecting computers over a local area, for
example one floor or all floors of an office building, a factory, or a school.
Linear editing
Editing while playing back video and audio signals recorded on video tape. See also
A connection which allows a signal input to an input connector to pass through the unit and exit from an output connector as input to external equipment. Also called bridging connection.
Luminance signal
The signal that determines the brightness of the picture. Also called Y signal. One of the component signals.
The number of frames of the time code and video run is not adjusted. When you use the time code in non- drop frame mode, the real playback time will be about 86 seconds shorter per day than the time code. If you edit frame by frame or if you determine the length of a shot by counting the time code, use drop frame mode.
Editing while playing back video and audio signals recorded on hard disks. Video scenes stored on disk can be cued up quickly, for increased editing efficiency. See also “Linear editing.”
PCM audio
This is an audio signal represented by pulse code modulation. The analog audio signal is first broken down into a sequence of pulses, and these are then represented digitally.
A chrominance signal determined by subtracting the Y (luminance) signal from the R (red) signal. One of the component signals.
Reference video signal
A video signal consisting of a sync signal or sync and burst signals, used as a reference.
SBP2 (Serial bus
Setup (for
The difference between the reference black level and the blanking level of a composite signal.
SMPTE
Abbreviation of Society of Motion Picture and Television Engineers, a professional association established in the USA.
S/N
Abbreviation of
Search mode
A VCR operating mode used when searching for specific scenes, by viewing the video output or time code values while playing back the tape at various speeds in forward or reverse direction.
Subcarrier
A sine wave imposed on the luminance portion of a video signal and modulated to carry color information. Its amplitude represents color saturation and its phase represents hue.
Superimpose
To put a set of characters onto a picture so that both can be seen at the same time.
A signal format in which Y (luminance) and C (chrominance) signals are separated to reduce interference between them so that noiseless images are reproduced.
104 Glossary